Sigla vs. Sigma

Sigla

The signs, abbreviations, letters, or characters standing for words, shorthand, etc., in ancient manuscripts, or on coins, medals, etc.

Sigmanoun

The eighteenth letter of the Classical and Modern Greek alphabets, the twentieth letter of Old and Ancient.

Sigmanoun

(mathematics) The symbol Σ, used to indicate summation of a set or series.

Sigmanoun

(statistics) The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.

Sigmanoun

The Greek letter

Sigmanoun

the 18th letter of the Greek alphabet

Sigma

Sigma (uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200.